Matching Design Method for Contact Load of Two-Stage Main Spring Type Non-Equal Bias Frequency Gradient Stiffness Leaf Spring

Abstract

The invention relates to a matching design method for contact load of a two-stage main spring type non-equal bias frequency gradually changing stiffness leaf spring, belonging to the technical field of suspension leaf springs. According to the structural parameters of the primary and secondary main springs and auxiliary springs of each sheet, the clamping distance of the saddle bolt, the no-load load, the rated load and the allowable stress, the present invention can perform a two-stage main spring non-equal deviation frequency gradient stiffness plate. The contact load of the spring is optimally matched with the design. Through the ANSYS simulation of the prototype and the loading deflection and stress tests, it can be seen that the matching design method of the contact load of the two-stage main spring type non-equal deviation frequency gradient stiffness leaf spring provided by the present invention is correct, and it is a two-stage main spring type non-equal deviation The design and characteristic simulation of frequency-type gradient stiffness leaf springs and the development of CAD software have laid a reliable technical foundation. Using this method, a reliable design value of the contact load can be obtained, and the ride comfort of the vehicle can be improved under the premise of satisfying the stress intensity of the leaf spring; at the same time, the cost of design and use test can be reduced, and the speed of product development can be accelerated.

Description

technical field [0001] The invention relates to a vehicle suspension leaf spring, in particular to a matching design method for a contact load of a two-stage main spring type non-equal bias frequency gradual stiffness leaf spring. Background technique [0002] In order to further improve the driving comfort of the vehicle under half-load conditions, the main spring of the original one-stage gradient stiffness leaf spring can be split into two-stage main springs, that is, a two-stage main spring type gradient stiffness leaf spring is used; at the same time, due to the The strength of the main spring is usually restricted by the initial tangent arc height of the first-stage main spring, the second-stage main spring and the auxiliary spring, and the two-stage gradual gap, so that the second-stage main spring and the auxiliary spring can properly bear the load in advance, thereby reducing the first-stage The stress of the two-stage main spring, that is, the two-stage main spring...

AI Technical Summary

Problems solved by technology

However, because the deflection calculation of the two-stage main spring type unequal frequency gradient stiffness leaf spring is very complicated, and is restricted by the calculation of the equivalent thickness of the root overlapping part and the maximum stress calculation of the main spring root, it has not been possible to give the two-stage main spring before. The contact load matching design method of non-equal bias frequency gradient stiffness leaf springs is mostly determined by experience, so it cannot meet the rapid development of the vehicle industry and the higher requirements for suspension springs

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